Certainly nothing to do with “assuming things are real” - there is quite impossible to translate it like that and B.Sujato had shown it in this topic: Upadana? Let go of clinging
And the rest of buddhist teachings strongly contradict this. It’s simply not how things go in the suttas. These are ideas completely alien to the suttas. If one is looking for a sutta to twist and something to mistranslate to make a case for solipsism, I am sure he can find something even in the bible. But if there is any kind of intelectual honesty such a thing is impossible.